Material: aluminum alloy, cylinder material: brass, round hole diameter: 50-62 mm. Adjustable latch (the distance from the center of the hole to the edge of the door) - 60 mm or 70mm; Suitable for door thickness: 35mm-45mm. Anti-collision bearing design, effectively facilitate the closing of the buffer. For use in exterior doors and interior where keyed entry and security is required. This door lock can be bolted on the inside or locked on the outside. When bolted on the inside, it can be unlocked using the key from the outside.